Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging
Electrical conductivity is a critical biomarker for cellular activity and a fundamental parameter in material science. However, achieving label-free, contact-free conductivity measurements with optical-scale resolution remains a challenge. Here, we introduce a magneto-photoacoustic coupling effect t...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-10-01
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| Series: | Photoacoustics |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213597925000783 |
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| author | Songqing Xie Zhuojun Xie Shuai Na |
| author_facet | Songqing Xie Zhuojun Xie Shuai Na |
| author_sort | Songqing Xie |
| collection | DOAJ |
| description | Electrical conductivity is a critical biomarker for cellular activity and a fundamental parameter in material science. However, achieving label-free, contact-free conductivity measurements with optical-scale resolution remains a challenge. Here, we introduce a magneto-photoacoustic coupling effect that enables conductivity mapping through photoacoustic excitation in the presence of a static magnetic field. The governing equation for this phenomenon is derived, demonstrating a linear relationship between the induced photoacoustic pressure and the product of the local magnetic flux density squared and electrical conductivity. This theoretical framework is further validated using numerical simulation, which showcases the method’s capability for optical-resolution conductivity imaging. The proposed approach unlocks new opportunities for applications ranging from real-time tracking of neuronal ion channel dynamics to nanoscale defect characterization in metallic and semiconductor materials. |
| format | Article |
| id | doaj-art-9acf1e1ed1ec4c4cb8d9f45807177a26 |
| institution | Kabale University |
| issn | 2213-5979 |
| language | English |
| publishDate | 2025-10-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Photoacoustics |
| spelling | doaj-art-9acf1e1ed1ec4c4cb8d9f45807177a262025-08-20T03:59:40ZengElsevierPhotoacoustics2213-59792025-10-014510075510.1016/j.pacs.2025.100755Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imagingSongqing Xie0Zhuojun Xie1Shuai Na2National Biomedical Imaging Center, College of Future Technology, Peking University, Beijing 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, ChinaNational Biomedical Imaging Center, College of Future Technology, Peking University, Beijing 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, ChinaNational Biomedical Imaging Center, College of Future Technology, Peking University, Beijing 100871, China; Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China; Beijing City Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China; PKU-Nanjing Institute of Translational Medicine, Nanjing 211800, China; Corresponding author at: National Biomedical Imaging Center, College of Future Technology, Peking University, Beijing 100871, China.Electrical conductivity is a critical biomarker for cellular activity and a fundamental parameter in material science. However, achieving label-free, contact-free conductivity measurements with optical-scale resolution remains a challenge. Here, we introduce a magneto-photoacoustic coupling effect that enables conductivity mapping through photoacoustic excitation in the presence of a static magnetic field. The governing equation for this phenomenon is derived, demonstrating a linear relationship between the induced photoacoustic pressure and the product of the local magnetic flux density squared and electrical conductivity. This theoretical framework is further validated using numerical simulation, which showcases the method’s capability for optical-resolution conductivity imaging. The proposed approach unlocks new opportunities for applications ranging from real-time tracking of neuronal ion channel dynamics to nanoscale defect characterization in metallic and semiconductor materials.http://www.sciencedirect.com/science/article/pii/S2213597925000783Magneto-photoacoustic couplingElectrical conductivity imagingOptical resolution |
| spellingShingle | Songqing Xie Zhuojun Xie Shuai Na Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging Photoacoustics Magneto-photoacoustic coupling Electrical conductivity imaging Optical resolution |
| title | Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging |
| title_full | Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging |
| title_fullStr | Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging |
| title_full_unstemmed | Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging |
| title_short | Magneto-photoacoustic coupling: A pathway to optical-resolution electrical conductivity imaging |
| title_sort | magneto photoacoustic coupling a pathway to optical resolution electrical conductivity imaging |
| topic | Magneto-photoacoustic coupling Electrical conductivity imaging Optical resolution |
| url | http://www.sciencedirect.com/science/article/pii/S2213597925000783 |
| work_keys_str_mv | AT songqingxie magnetophotoacousticcouplingapathwaytoopticalresolutionelectricalconductivityimaging AT zhuojunxie magnetophotoacousticcouplingapathwaytoopticalresolutionelectricalconductivityimaging AT shuaina magnetophotoacousticcouplingapathwaytoopticalresolutionelectricalconductivityimaging |